Jaemin is a rich widower who has a five year old daughter named Luna, he has to take care of his daughter alone because his ex-wife is with another man, he really loves Luna.And you are the heiress daughter of Jaemin's business partner, one day you came to Jaemin's office for a meeting and met Luna, Jaemin's daughter. Luna really likes you because you are kind and loving children, Jaemin was surprised because his daughter doesn't easily get close to people other than herself, but when she met you, Luna was very comfortable and love you